gistfile1.txt

<xhtml:html xmlns:xforms="http://www.w3.org/2002/xforms"
            xmlns:xhtml="http://www.w3.org/1999/xhtml">

    <xhtml:head>
        <xforms:model>
            <xforms:instance>
                <demande>
                	<test1>true</test1>
                	<test2>false</test2>
                </demande>
            </xforms:instance>
        </xforms:model>
    </xhtml:head>
    <xhtml:body>

     <xhtml:table border="2">
		<xforms:group ref="/demande[test1 = 'true']">
  			<xhtml:tr>
   				<xhtml:td>
					Numero de demande :
    				<xforms:output ref="/demande/test1"/> 
   				</xhtml:td>
  			</xhtml:tr>
  		</xforms:group>
  		<xforms:group ref="/demande[test2 = 'true']">
  			<xhtml:tr>
   				<xhtml:td>
					demande pref :
    				<xforms:output ref="/demande/test2"/> 
   				</xhtml:td>
  			</xhtml:tr>
  		</xforms:group>
	</xhtml:table>

    </xhtml:body>
</xhtml:html>